関連ワード:  why do we use serializable in java    why do we use serialization in java    why do we need serialization in java    why do we use serializable interface in java    why do we need to implement serializable in java    why do we need serialization and deserialization in java    why do we need to serialize objects in java    why we use serialization id in java    when to use serializable in java    what is serialization in java and why it is used